SANS 60331-3-2009 Tests for electric cables under fire conditions - Circuit integrity Part 3 Test method for fire with shock at a temperature of at least 830 C for cables of rated i.pdf

1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-23206-1 SANS 60331-3:2009Edition 1IEC 60331-3:2009Edition 1SOUTH AFRICAN NATIONAL STANDARD Tests for electric cables under fire conditions

4、 Circuit integrity Part 3: Test method for fire with shock at a temperature of at least 830 C for cables of rated voltage up to and including 0,6/1,0 kV tested in a metal enclosure This national standard is the identical implementation of IEC 60331-3:2009 and is adopted with the permission of the In

5、ternational Electrotechnical Commission. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001 Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 60331-3:2009 Edition 1 IEC 60331-3:2009 Edition 1 Table of changes Change No. Date Scope Nation

6、al foreword This South African standard was approved by National Committee SABS TC 66, Electric cables, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in September 2009. IEC 60331-3Edition 1.0 2009-0

7、5INTERNATIONAL STANDARD NORME INTERNATIONALETests for electric cables under fire conditions Circuit integrity Part 3: Test method for fire with shock at a temperature of at least 830 C for cables of rated voltage up to and including 0,6/1,0 kV tested in a metal enclosure Essais pour cbles lectriques

8、 soumis au feu Intgrit des circuits Partie 3: Mthode dessai au feu pour les cbles de tension assigne au plus gale 0,6/1,0 kV, essays sous conduit mtallique avec chocs, une temprature dau moins 830 C INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE TICS 29.060.20;

9、29.20; 13.220.40 PRICE CODECODE PRIXISBN 2-8318-1042-9GROUP SAFETY PUBLICATION PUBLICATION GROUPE DE SCURIT Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale SANS 60331-3:2009This s tandard may only be used and printed

10、 by approved subscription and freemailing clients of the SABS . 2 60331-3 IEC:2009 CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references7 3 Terms and definitions .7 4 Test conditions Test environment.8 5 Test apparatus .8 5.1 Test equipment8 5.2 Metal enclosure .13 5.2.1 Material and d

11、imensions 13 5.2.2 Metal enclosure selection.13 5.3 Test ladder and mounting 13 5.4 Source of heat.14 5.4.1 Burner .14 5.4.2 Flow meters and flow rates 15 5.4.3 Verification 16 5.5 Shock producing device.16 5.6 Positioning of source of heat17 5.7 Continuity checking arrangements .17 5.8 Fuses 17 6 T

12、est specimen 17 6.1 Test specimen preparation.17 6.2 Test specimen mounting18 7 Test procedure .18 7.1 Test equipment and arrangement.18 7.2 Electrical connections18 7.3 Flame and shock application20 7.4 Electrification.20 8 Performance requirement .21 8.1 Flame application time.21 8.2 Acceptance cr

13、iteria 21 9 Retest procedure 21 10 Test report21 Annex A (normative) Verification procedure for the source of heat 22 Annex B (informative) Guidance on the choice of recommended test apparatus 24 Bibliography25 Figure 1 Schematic diagram of test configuration9 Figure 2 Recommended method of mounting

14、 the metal enclosure to the test ladder 10 Figure 3 Plan view of fire test equipment 11 Figure 4 End elevation of fire test equipment (not to scale) .12 Figure 5 Typical rubber bush for supporting the test ladder .14 Figure 6 Burner face 15 SANS 60331-3:2009This s tandard may only be used and printe

15、d by approved subscription and freemailing clients of the SABS .60331-3 IEC:2009 3 Figure 7 Schematic diagram of an example of a burner control system using rotameters 16 Figure 8 Basic circuit diagram 20 Figure A.1 Temperature measuring arrangement 22 Table 1 Enclosure dimensions13 Table 2 Multicor

16、e sheathed cable .18 Table 3 Single core unsheathed or sheathed cable .18 SANS 60331-3:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS . 4 60331-3 IEC:2009 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ TESTS FOR ELECTRIC CABLES UNDER FIRE CO

17、NDITIONS CIRCUIT INTEGRITY Part 3: Test method for fire with shock at a temperature of at least 830 C for cables of rated voltage up to and including 0,6/1,0 kV tested in a metal enclosure FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization

18、 comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International

19、 Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this

20、 preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two o

21、rganizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the f

22、orm of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpre

23、tation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or

24、regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this

25、 publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indi

26、rect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for th

27、e correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60331-3 has been prep

28、ared by IEC technical committee 20: Electric cables. The text of this standard is based on the following documents: FDIS Report on voting 20/1051/FDIS 20/1055/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This

29、publication has been drafted in accordance with the ISO/IEC Directives, Part 2. SANS 60331-3:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .60331-3 IEC:2009 5 It has the status of a group safety publication in accordance with IEC Guide 1

30、04. A list of all the parts in the IEC 60331 series, under the general title Tests for electric cables under fire conditions circuit integrity, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date ind

31、icated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. SANS 60331-3:2009This s tandard may only be used and printed by approved subscription and

32、 freemailing clients of the SABS . 6 60331-3 IEC:2009 INTRODUCTION IEC 60331 consists of the following parts under the general title: Tests for electric cables under fire conditions Circuit integrity: Part 1: Test method for fire with shock at a temperature of at least 830 C for cables of rated volt

33、age up to and including 0,6/1,0 kV and with an overall diameter exceeding 20 mm Part 2: Test method for fire with shock at a temperature of at least 830 C for cables of rated voltage up to and including 0,6/1,0 kV and with an overall diameter not exceeding 20 mm Part 3: Test method for fire with sho

34、ck at a temperature of at least 830 C for cables of rated voltage up to and including 0,6/1,0 kV tested in a metal enclosure Part 11: Apparatus Fire alone at a flame temperature of at least 750 C Part 21: Procedures and requirements Cables of rated voltage up to and including 0,6/1,0 kV Part 23: Pro

35、cedures and requirements Electric data cables Part 25: Procedures and requirements Optical fibre cables NOTE Parts 21, 23 and 25 relate to fire-only conditions at a flame temperature of at least 750 C. Since its first edition (1970), IEC 60331 has been extended and has introduced a range of test app

36、aratus in order that a test may be carried out on large and small power, control, data and optical fibre cables. IEC 60331-3 introduces apparatus and a procedure to allow cables to be tested in a metal enclosure under conditions of mechanical shock as well as fire at temperature of at least 830 C. S

37、ANS 60331-3:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .60331-3 IEC:2009 7 TESTS FOR ELECTRIC CABLES UNDER FIRE CONDITIONS CIRCUIT INTEGRITY Part 3: Test method for fire with shock at a temperature of at least 830 C for cables of rate

38、d voltage up to and including 0,6/1,0 kV tested in a metal enclosure 1 Scope This part of IEC 60331 specifies the test apparatus and procedure and gives the performance requirements, including recommended flame application times, for low-voltage power cables of rated voltage up to and including 0,6/

39、1,0 kV, and control cables with a rated voltage which are required to maintain circuit integrity when tested in a metal enclosure and when subject to fire and mechanical shock under specified conditions. This standard describes the means of sample preparation, the continuity checking arrangements, t

40、he electrical testing procedure, the method of burning the cables and the method of shock production and gives requirements for evaluating test results. NOTE All cables assessed by this method should first have been assessed against the test of IEC 60331-1 or IEC 60331-2. Such performance may be rec

41、ognized by the marking according to Clause 11 of IEC 60331-1 or Clause 11 of IEC 60331-2. Annex A provides the method of verification of the burner and control system used for the test. 2 Normative references The following referenced documents are indispensable for the application of this document.

42、For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60269-3, Low-voltage fuses Part 3: Supplementary requirements for fuses for use by unskilled persons (fuses mainly for household and sim

43、ilar applications) Examples of standardized systems of fuses A to F IEC 60331-1, Tests for electric cables under fire conditions Circuit integrity Part 1: Test method for fire with shock at a temperature of at least 830 C for cables of rated voltage up to and including 0,6/1,0 kV and with an overall

44、 diameter exceeding 20 mm IEC 60331-2, Test for electric cables under fire conditions Circuit integrity Part 2: Test method for fire with shock at a temperature of at least 830 C for cables of rated voltage up to and including 0,6/1,0 kV and with an overall diameter not exceeding 20 mm IEC 60584-1,

45、Thermocouples Part 1: Reference tables IEC Guide 104, The preparation of safety publications and the use of basic safety publications and group safety publications 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. SANS 60331-3:2009This s tandard ma

46、y only be used and printed by approved subscription and freemailing clients of the SABS . 8 60331-3 IEC:2009 3.1 circuit integrity ability of an electric cable to continue to operate in a designated manner whilst subjected to a specified flame source for a specified period of time under specified co

47、nditions. 4 Test conditions Test environment The test shall be carried out in a suitable chamber, of minimum volume 10 m3, with facilities for disposing of any noxious gases resulting from burning. Sufficient ventilation shall be available to sustain the flame for the duration of the test. NOTE 1 Gu

48、idance on the choice of suitable chambers and the need for shielding is given in Annex B. The chamber and test apparatus shall be at a temperature of between 10 C and 40 C at the start of each test. The same ventilation and shielding conditions shall be used in the chamber during both the verificati

49、on and cable test procedures. NOTE 2 The test given in this standard may involve the use of dangerous voltages and temperatures. Suitable precautions should be taken against the risk of shock, burning, fire and explosion that may be involved, and against any noxious fumes that may be produced. 5 Test apparatus 5.1 Test equipment The test equipment shall consist of the following: a) a metal enclosure, through which the test